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 NEW    Bruce Heran outlines the details and construction of his simple DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project.

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Push-Pull_6L6_Tube_Amplifier_Bottom.jpg
Push-Pull_6L6_Tube_Amplifier_Bottom.jpgUnderside - Push-Pull 6L6 Tube Amplifier2081 viewsUnderside view of my 6L6 tube amplifier. See the other photographs of my DIY 6L6 tube amplifier.

Panagiotis Gavriil (Greece)

See the DIY Audio Schematics page for more 6L6 amplifiers.
Jul 04, 2011
Push-Pull__Amplifier_6L6_Tube_Glow.jpg
Push-Pull__Amplifier_6L6_Tube_Glow.jpgTube Glow - Push-Pull 6L6 Tube Amplifier2175 viewsThe glowing tubes of my 6L6 amplifier. The large tubes are the 6L6 output tubes and the smaller tubes are the 12AX7 driver tubes. The bright tube in the middle is an EM80. See the other photos of my 6L6 amp.

Panagiotis Gavriil (Greece)

See the DIY Audio Schematics page for more 6L6 amplifier schematics.
Jul 04, 2011
12au7_4S_preamp.jpg
12au7_4S_preamp.jpg12au7 preamp1793 viewsIn this build I employed a single stage tube preamp to provide gain and volume control to my 3W 6AS7 SET amp. This preamp uses a 24VAC wall wart and by configuring a 24/240V step down tranni to work backwards I can gain 280VDC across the 12AU7. No hook-up wire is used in the amp cct. only component-2-component wiring. The preamp produces no hum or buzz. It extends to a deep rich bass and very natural mids and highs. The frequency response is flat from 10hz to 130KHz and square way performance is exceptional. There is more information in the Super simple single stage tube preamp thread on the forum.

http://www.retro-thermionic.blogspot.com/
Jun 28, 2011
Copper_Steampunk_K-12GTube_Amplifier_Kit.jpg
Copper_Steampunk_K-12GTube_Amplifier_Kit.jpgCopper Steampunk K-12G Tube Amp Kit7695 viewsThis is a K-12G tube amplifier kit that I built into a steampunk-ish enclosure. Had a blast with this one, and I'm amazed at the amount of wonderful sound that this little tube amp kit puts out!

I'll be posting construction photos on my blog site if you're interested in taking a look: www.coppersteam.com

Mike Cochran
Key West, USA
Jun 13, 2011
Copper_Steampunk_K-12GTube_Amplifier_Kit_2.jpg
Copper_Steampunk_K-12GTube_Amplifier_Kit_2.jpgCopper Steampunk K-12G Tube Amp Kit - Rear5862 viewsThis is a K-12G tube amplifier kit that I built into a steampunk-ish enclosure. Had a blast with this one, and I'm amazed at the amount of wonderful sound that this little tube amp kit puts out!

I'll be posting construction photos on my blog site if you're interested in taking a look: www.coppersteam.com

Mike Cochran
Key West, USA
Jun 13, 2011
Silver_Dragon_300BSE.jpg
Silver_Dragon_300BSE.jpgretro-thermionic Silver Dragon 300BSE1961 viewsThis amp has taken nine months to build. It was design by
Suncalc on the forum from the ground up based on three criteria I stipulated: 1-two stage 0NF, 2-6SN7 and 300B tubes with tube rectification and 3-Single ended.

Most of the main components were selected by the customer I built it for: TJ Full Music 300BSE(RRP $1200), 50 year Treasure 6SN7, Audio Note Silver foil caps, Mundorf M-Tube poly filter caps, silver wire in the audio path. Other components were my selection.

The bass is extended, full rich mids and treble bright and extended. Very expensive to build and a long time in the making but really worth it. http://www.retro-thermionic.blogspot.com/
May 22, 2011
5751-SRPP-Push-Pull-EL84-Tube-Amp.jpg
5751-SRPP-Push-Pull-EL84-Tube-Amp.jpg5751 SRPP / Push-Pull EL84 Tube Amplifier2349 viewsThree months ago, I finished the PoddWatt 5751 SRPP / Push-Pull EL84 tube amp. This is a great amplifier with great sound. Now it is connected in UL mode without any NFB. I would like to try the amp in a Triode connection mode, but I do, there is too much power loss so I am investigating a the possibility of a parallel push-pull output stage.

This enclosure is made using the material Corian which is a product by DuPont often used for counter-tops.

Dean

For full details of this tube amplifier circuit, see the PoddWatt 5751 SRPP / EL84 (6BQ5) Push-Pull Tube Amp Project page.
May 21, 2011
TDA2003-DIY-HiFi-Amplifier.jpg
TDA2003-DIY-HiFi-Amplifier.jpgTDA2030 DIY HiFi Amplifier6305 viewsAnother excellent looking build by vortchun. This DIY amplifier is built around the TDA2030 which will put out a maximum of 14W. The wooden enclosure matches the previously completed Voight Pipe Speakers Visaton BG 17 driver project.

For full details of this TDA2030 chip amplifier build, see the TDA2030 DIY Amplifier thread on the discussion forum.
May 11, 2011
Feastrex-NF-5-Bass-Reflex-Enclosure.jpg
Feastrex-NF-5-Bass-Reflex-Enclosure.jpgFeastrex NF-5 Bass Reflex Speakers5856 viewsThe lovely Feastrex NF-5 fullrange drivers on display at the 2011 Salon Son & Image show. The single fullrange drivers were housed in a bass reflex enclosure and driven by a Mastersound Compact 845 SET amp.

See the Feastrex NF-5 and NF-5ex Drivers SSI 2011 report for more details.
Apr 07, 2011
Voxativ-Ampeggio-Back-Loaded-Horn-Speaker.jpg
Voxativ-Ampeggio-Back-Loaded-Horn-Speaker.jpgVoxativ Ampeggio Back Loaded Horn Speaker2222 viewsThe Voxativ Ampeggio Back Loaded Horn Speaker on display at the 2011 Salon Son & Image show.

The Ampeggio uses the Voxativ AC-3X and the sensitivity is 101 dB / 1w / 1m.

For more information see the Voxativ Ampeggio Horn Speakers - SSI 2011 show report.
Apr 07, 2011
Nagra-300i-300B-Integrated-Amplifier.jpg
Nagra-300i-300B-Integrated-Amplifier.jpgNagra 300i Integrated Tube Amplifier (300B)2539 viewsThe new Nagra 300i Integrated 300B Tube Amplifier on display at the 2011 Salon Son & Image show.

The integrated amplifier uses four JJ 300B directly heated triodes in a push-pull configuration in class-A operation. Output power is 20Wpc.
Apr 05, 2011
Audio-Note-Jinro-Integrated-211-Tube-Amplifier.jpg
Audio-Note-Jinro-Integrated-211-Tube-Amplifier.jpgAudio Note Jinro Integrated Tube Amp (SE 211)2301 viewsAudio Note Jinro Integrated Tube Amplifier on display at the 2011 Salon Son & Image show in Montreal.

Tubes: 2 x 5R4WGB, 2 x 211, 1 x ECC82 (or 5814a), 1 x 7044 (or 5687).

Power: 18Wpc into 8ohm @ 5% THD.
Weight: 85lbs
Cost: $26,500
Apr 05, 2011
Ayon-Triton-KT88-Tube-Amplifier.jpg
Ayon-Triton-KT88-Tube-Amplifier.jpgAyon Triton KT88 Tube Amplifier2014 viewsAn Ayon Triton KT88 Tube Amplifier on display at the 2011 Salon Son & Image show.

8 x KT88 and 6 x 12AU7. The amp is switchable between Class-A Operation Triode (80W) or Pentode (125W) mode.

For more coverage from the hi-fi audio show see the Salon Son & Image 2011 show coverage thread on the forum.
Apr 05, 2011
lafleuraudio-X2-speaker.jpg
lafleuraudio-X2-speaker.jpgLafleurAudio X2 Speaker1642 viewsThe LafleurAudio X2 Speaker on display at the 2011 Salon Son & Image show.

The speakers use a heavily braced curved speaker enclosure in a 2.5 way design and the total weight is 55 lbs each. The nominal impedance is 4 ohms, sensitivity is 90dB and the frequency response is noted at 45Hz to 20kHz.

For more coverage from the show, Salon Son & Image 2011 show coverage thread.
Apr 04, 2011
Specimen-Little-Horn-Speakers-with-Fostex-FE108E-Sigma.jpg
Specimen-Little-Horn-Speakers-with-Fostex-FE108E-Sigma.jpgLittle Horn Speakers with Fostex FE108E Sigma Drivers1584 viewsThe Little Horn Speakers produced by Specimen Products on display at Salon Son & Image 2011. The Little Horn Speakers use the Fostex FE108E Sigma driver.

For more information about the Little Horn Speakers, see our coverage from SSI 2011: Specimen Products Little Horn Speakers.
Apr 02, 2011
Orangutan-O-96-Oscar-2-way-Speakers.jpg
Orangutan-O-96-Oscar-2-way-Speakers.jpgOrangutan O/96 Highly Sensitive Speakers1626 viewsThe Orangutan O/96 High Sensitivity Speakers on display at the 2011 Salon Son & Image show.

For more information, see our show coverage: Orangutan O/96 High Sensitivity Speakers.
Apr 02, 2011
Single-Ended-300B-Tube-Amp-MockupIIs.jpg
Single-Ended-300B-Tube-Amp-MockupIIs.jpgSingle-Ended 300B Tube Amplifier - Mockup IIs2459 viewsThis is my first 300B tube amplifier. The power supply will be separate from the amp. The tubes are $1200 rrp TJ Full Music 300B/SE carbon plates. The 6SN7 is a 50 year Treasure. The audio output transformers are 30W Hammonds. The base is Mirbeau and the top and bottom plates are 2mm thick aluminum. Signal wiring is 0.7mm pure silver wire and super heavy gold plated speaker binding posts.

For the design information see the 300B SET Design Project thread on the forum.

Mark Houston (Australia) - retro-thermionic
Mar 31, 2011
RH84_-_SE_EL84_Tube_Amp.jpg
RH84_-_SE_EL84_Tube_Amp.jpgRH84 - SE EL84 Tube Amplifier2436 viewsThe first tube amp I built and I love the sound... pentode power with triode sound! The amplifier topology is the RH84 from designer Alex Kitic. I am using JJ EL84 and Sylvania 12AT7 tubes. The most important aspect of this ingenious design is the plate to plate partial feedback without global feedback, 2nd harmonic distortion is slightly increased giving the impression of listening to a SET amp. Damping factor and bandwidth are also improved. The OPT are from a salvaged an RCA console - a gift from Dave of Planet10 (thanks).

What a great amp !

Isophon, Canada
Mar 30, 2011
Chinook_13FD7_SET_Tube_Amp.jpg
Chinook_13FD7_SET_Tube_Amp.jpgChinook 13FD7 SET Tube Amplifier2098 viewsThis is the second tube amplifier I have built and of course I'm hooked BIG TIME!! I love it. The tube amplifier is the Chinook (Baby SET, 2.5W/ch) with one 13FD7 per channel and a EM80 for VU meter. OPT are Edcor GXSE10-8-5K. This amp makes for a great sound and vision show ;-)

Isophon, Canada
Mar 30, 2011
Listening-Room-Nikola-Azazello.jpg
Listening-Room-Nikola-Azazello.jpgNikola's (Azazello) Tube Listening Room2161 viewsPhotograph of my tube amplifier in my listening room.

From left to right on the shelf:
SE 6Ф3П
SE 2A3 RCA
OTL 6AS7
EL11 Telefunken
PP 6П3С (variant of Leibowitz circuit)

From left to right on the floor:
PP 6005 - variant Leibowitz
SE 300B JJ
SE 6С4С
SE EL11 Tungsram
Mar 15, 2011
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